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Finding the Fourth Proportional to 39,893.52, 55,052.76 and 21,988.56

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Solution

The fourth proportional to 39,893.52, 55,052.76 and 21,988.56 is: 30,344.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,893.52 : 55,052.76 = 21,988.56 : x
  2. Step 2: Convert to fraction form
    39,893.52/55,052.76 = 21,988.56/x
  3. Step 3: Cross multiply
    39,893.52x = 55,052.76 × 21,988.56
  4. Step 4: Simplify right side
    39,893.52x = 1,210,530,916.43
  5. Step 5: Solve for x
    x = 1,210,530,916.43/39,893.52
  6. Step 6: Final answer
    x = 30,344.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.